Natalie Portman is known for showing off her temper in Saturday Night Live raps andLonely Island video cameos, but when the paparazzi got too close to her family, it was fiance Benjamin Millepied who got angry.“Back off!” Benjamin exclaimed in a video taken by E! Online as he tried to hold baby Aleph and guide Natalie through the swarms of paparazzi.While Natalie was more calm, both parents were visibly frustrated.“Be safe,” the actress cautioned, but her partner snapped when a paparazzo bumped into him. The couple then immediately got into the car — their son appearing upset by the commotion.